类似地，完成notify() 以后，等待者的最高优先级队列前端的线程从等待中解除阻塞。
Similarly, when a notify() is done, the thread from the front of the highest-priority queue of waiters is unblocked from its wait.
释放锁以后，系统从争用者的最高优先级队列的前端选择线程，以便试图锁定对象。
When a lock is released, the system chooses the thread from the front of the highest-priority queue of contenders to try to lock the object.
一个从非空运行队列的前端分派的线程具有最高的优先级。
A thread is dispatched from the front of the nonempty run-queue with the highest priority.
add方法向队列中添加一个电子邮件，这个方法由前端使用。
The add method adds an E-mail to the queue and is meant to be used by the front end.
WM_HOTKEY消息在用户键入被RegisterHotKey函数注册的热键时发送。该消息将位于消息队列的最前端，并且与注册了这个热键的进程关联。
Posted when the user presses a hot key registered by the RegisterHotKey function. The message is placed at the top of the message queue associated with the thread that registered the hot key.
通过从队列的前端分派线程和在队列的后端放置过期的线程，程序在一个优先级中轮替执行。
By dispatching from a queue's head and placing expired threads at a queue's tail, execution happens in a round-robin fashion within a priority.
例如，您可能想要实现一个Web服务前端，其中请求写到WebSpheremq队列中。
For example, you might want to implement a Web service front end where the requests are written to a WebSphere MQ queue.
从队列最前端移除一个队列函数，并执行他。
Removes a queued function from the front of the queue and executes it.
从队列最前端移除一个队列函数，并执行他。
Removes a queued function from the front of the queue and executes it.
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